Carbon having valence electron 4 ,0 lone pair electron and 4 bonds around it. I hope you have completely understood all the above steps.įor more practice and better understanding, you can try other lewis structures listed below.Image credit : Carbon dioxide from istockĬarbon dioxide is contain 1 carbon and 2 oxygen molecule covalently bonded with each other. By doing so, you will get the following lewis structure of C2H5OH. In the above lewis dot structure of C2H5OH, you can also represent each bonding electron pair (:) as a single bond (|). This indicates that the above lewis structure of C2H5OH is stable and there is no further change in the above structure of C2H5OH. You can see the number of bonding electrons and nonbonding electrons for each atom of C2H5OH molecule in the image given below.įor Carbon (C) atom: Valence electrons = 4 (because carbon is in group 14) Bonding electrons = 8 Nonbonding electrons = 0įor Hydrogen (H) atom: Valence electron = 1 (because hydrogen is in group 1) Bonding electrons = 2 Nonbonding electrons = 0įor Oxygen (O) atom: Valence electrons = 6 (because oxygen is in group 16) Bonding electrons = 4 Nonbonding electrons = 4 Formal chargeįrom the above calculations of formal charge, you can see that the carbon (C) atoms, hydrogen (H) atoms as well as oxygen (O) atom have a “zero” formal charge. In short, now you have to find the formal charge on carbon (C) atoms, hydrogen (H) atoms as well as oxygen (O) atom present in the C2H5OH molecule.įor calculating the formal charge, you have to use the following formula įormal charge = Valence electrons – (Bonding electrons)/2 – Nonbonding electrons The stability of lewis structure can be checked by using a concept of formal charge. Now you have come to the final step in which you have to check the stability of lewis structure of C2H5OH. Step 6: Check the stability of lewis structure Total valence electrons in C2H5OH molecule = valence electrons given by 2 carbon atom + valence electrons given by 6 hydrogen atoms + valence electrons given by 1 oxygen atom = 4(2) + 1(6) + 6 = 20. You can see the 6 valence electrons present in the oxygen atom as shown in the above image. Hence the valence electrons present in oxygen is 6. Oxygen is group 16 element on the periodic table. → Valence electrons given by oxygen atom: You can see that only 1 valence electron is present in the hydrogen atom as shown in the above image. Hence the valence electron present in hydrogen is 1. Hydrogen is group 1 element on the periodic table. → Valence electrons given by hydrogen atom: You can see the 4 valence electrons present in the carbon atom as shown in the above image. Hence the valence electrons present in carbon is 4. → Valence electrons given by carbon atom:Ĭarbon is group 14 element on the periodic table. Total valence electrons in C2H5OH molecule Here, I’ll tell you how you can easily find the valence electrons of carbon, hydrogen as well as oxygen using a periodic table. (Valence electrons are the electrons that are present in the outermost orbit of any atom.) In order to find the total valence electrons in a C2H5OH molecule, first of all you should know the valence electrons present in carbon atom, hydrogen atom as well as oxygen atom. Steps of drawing C2H5OH lewis structure Step 1: Find the total valence electrons in C2H5OH molecule
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